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CVE-2021-21220 : What You Need to Know

Discover the impact and mitigation strategies for CVE-2021-21220, an insufficient validation vulnerability in V8 in Google Chrome prior to 89.0.4389.128, enabling remote code execution.

A detailed overview of CVE-2021-21220 focusing on the impact, technical details, and mitigation strategies.

Understanding CVE-2021-21220

This section provides insights into the vulnerability CVE-2021-21220 found in Google Chrome.

What is CVE-2021-21220?

CVE-2021-21220 highlights an insufficient validation of untrusted input in V8 in Google Chrome prior to version 89.0.4389.128. It enabled a remote attacker to potentially exploit heap corruption through a crafted HTML page.

The Impact of CVE-2021-21220

The vulnerability allowed attackers to trigger heap corruption in Chrome, potentially leading to remote code execution and system compromise.

Technical Details of CVE-2021-21220

This section delves into the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The flaw stemmed from insufficient validation of untrusted input in V8, the open-source JavaScript and WebAssembly engine in Chrome.

Affected Systems and Versions

Google Chrome versions prior to 89.0.4389.128 deployed on unspecified systems were vulnerable to this exploit.

Exploitation Mechanism

By deploying a specifically crafted HTML page, remote attackers could trigger heap corruption in Chrome, paving the way for potential exploitation.

Mitigation and Prevention

Learn about the immediate steps to take and long-term security practices to safeguard against CVE-2021-21220.

Immediate Steps to Take

Users are advised to update Chrome to version 89.0.4389.128 or later to mitigate the vulnerability. Additionally, exercise caution while visiting unknown or untrusted websites.

Long-Term Security Practices

To enhance system security in the long run, ensure timely patching of software and maintain awareness regarding the latest security updates.

Patching and Updates

Regularly check for software updates and security advisories released by Google Chrome to address known vulnerabilities and bolster system security.

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